P2008: Intake Manifold Runner Control Circuit/Open Bank 1
What to do
Expect a flat spot or restricted power. Worth asking whether the flaps themselves were checked for free movement as well as the electrics — the two faults feel identical from the driver's seat and are repaired differently.
What this code means
An electrical fault in the circuit driving the manifold runner actuator on bank 1, as distinct from the flaps being mechanically stuck.
The distinction is worth making because the repairs differ entirely. A stuck-flap code means carbon and a cleaning job; a circuit code means wiring, a connector or the actuator's own motor or solenoid, with the flaps potentially in perfect condition. Both produce the same driving complaint, so the code family is what separates them rather than the symptom.
On vacuum-operated systems, the "circuit" is the solenoid that admits vacuum rather than a motor, and a perished hose downstream produces a fault that measures as electrically healthy while nothing moves. Checking the vacuum actually reaches the actuator is worth doing before the part is condemned.
Likely causes
Start here
- Failed manifold runner actuator · moderate
- Open circuit in actuator wiring · moderate
- Corroded or loose connector · easy
- Disconnected or leaking vacuum hose · easy
Rare
- Faulty engine control module · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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